Quantum oscillations and subband properties of the two-dimensional electron gas at the LaAlO3/SrTiO3 interface

A. McCollam, Sander Wenderich, Michelle Kruize, V.K. Guduru, Hajo Molegraaf, Mark Huijben, Gertjan Koster, David H.A. Blank, Augustinus J.H.M. Rijnders, Alexander Brinkman, H. Hilgenkamp, U. Zeitler, J.C. Maan

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Abstract

We have performed high field magnetotransport measurements to investigate the interface electron gas in a high mobility SrTiO3/SrCuO2/LaAlO3/SrTiO3 heterostructure. Shubnikov-de Haas oscillations reveal several 2D conduction subbands with carrier effective masses of 0.9m e and 2m e , quantum mobilities of order 2000 cm2/V s, and band edges only a few millielectronvolts below the Fermi energy. Measurements in tilted magnetic fields confirm the 2D character of the electron gas, and show evidence of inter-subband scattering.
Original languageEnglish
Article number022102
Number of pages7
JournalAPL materials
Volume2
Issue number2
DOIs
Publication statusPublished - 2014

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Electron gas
Two dimensional electron gas
Galvanomagnetic effects
Fermi level
Heterojunctions
Scattering
Magnetic fields
strontium titanium oxide

Keywords

  • IR-91527
  • METIS-304627

Cite this

McCollam, A., Wenderich, S., Kruize, M., Guduru, V. K., Molegraaf, H., Huijben, M., ... Maan, J. C. (2014). Quantum oscillations and subband properties of the two-dimensional electron gas at the LaAlO3/SrTiO3 interface. APL materials, 2(2), [022102]. https://doi.org/10.1063/1.4863786
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abstract = "We have performed high field magnetotransport measurements to investigate the interface electron gas in a high mobility SrTiO3/SrCuO2/LaAlO3/SrTiO3 heterostructure. Shubnikov-de Haas oscillations reveal several 2D conduction subbands with carrier effective masses of 0.9m e and 2m e , quantum mobilities of order 2000 cm2/V s, and band edges only a few millielectronvolts below the Fermi energy. Measurements in tilted magnetic fields confirm the 2D character of the electron gas, and show evidence of inter-subband scattering.",
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year = "2014",
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Quantum oscillations and subband properties of the two-dimensional electron gas at the LaAlO3/SrTiO3 interface. / McCollam, A.; Wenderich, Sander; Kruize, Michelle; Guduru, V.K.; Molegraaf, Hajo; Huijben, Mark; Koster, Gertjan; Blank, David H.A.; Rijnders, Augustinus J.H.M.; Brinkman, Alexander; Hilgenkamp, H.; Zeitler, U.; Maan, J.C.

In: APL materials, Vol. 2, No. 2, 022102, 2014.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Quantum oscillations and subband properties of the two-dimensional electron gas at the LaAlO3/SrTiO3 interface

AU - McCollam, A.

AU - Wenderich, Sander

AU - Kruize, Michelle

AU - Guduru, V.K.

AU - Molegraaf, Hajo

AU - Huijben, Mark

AU - Koster, Gertjan

AU - Blank, David H.A.

AU - Rijnders, Augustinus J.H.M.

AU - Brinkman, Alexander

AU - Hilgenkamp, H.

AU - Zeitler, U.

AU - Maan, J.C.

PY - 2014

Y1 - 2014

N2 - We have performed high field magnetotransport measurements to investigate the interface electron gas in a high mobility SrTiO3/SrCuO2/LaAlO3/SrTiO3 heterostructure. Shubnikov-de Haas oscillations reveal several 2D conduction subbands with carrier effective masses of 0.9m e and 2m e , quantum mobilities of order 2000 cm2/V s, and band edges only a few millielectronvolts below the Fermi energy. Measurements in tilted magnetic fields confirm the 2D character of the electron gas, and show evidence of inter-subband scattering.

AB - We have performed high field magnetotransport measurements to investigate the interface electron gas in a high mobility SrTiO3/SrCuO2/LaAlO3/SrTiO3 heterostructure. Shubnikov-de Haas oscillations reveal several 2D conduction subbands with carrier effective masses of 0.9m e and 2m e , quantum mobilities of order 2000 cm2/V s, and band edges only a few millielectronvolts below the Fermi energy. Measurements in tilted magnetic fields confirm the 2D character of the electron gas, and show evidence of inter-subband scattering.

KW - IR-91527

KW - METIS-304627

U2 - 10.1063/1.4863786

DO - 10.1063/1.4863786

M3 - Article

VL - 2

JO - APL materials

JF - APL materials

SN - 2166-532X

IS - 2

M1 - 022102

ER -